Every time you start to hear the noise of cars or have flashing lights that may be no problem on the car needs to be repaired immediately or it can be a minor nuisance that can be fixed after you get tired of it. However, this does not mean you should ignore the sound of the engine or signal lights. Instead you should always investigate the source of an engine problem before it becomes a bigger problem and decide whether to repair the car needed.
For low pressure conditions of the first places you should check is the dipstick. If you find that you have the engine oil level is low then you can be either combustion or leaking oil. To treat a while can be obtained by adding the oil but the problem will continue until you get the right auto repair to resolve the issue. For the oil leak problem you can get a new gasket or seal so that the leakage will stop. For engines that burn oil wet compression test and / or below the leak test will help determine what the exact problem is whether the valve is worn, torn seals, or a bad piston ring and cylinder wear.
Unit flow pressure is the next thing that you should check whether your oil level is fine. Check the warning light or gauge reading once you decide unit. There may be a short circuit to ground in the circuit if the warning light stays on when disconnected. If reading the measuring instrument does not change then you may have problems with instrumentation and not the machine itself.
Just always remember that it is important to check your engine at the first sign of noise or warning lights. Please check whether you will do it yourself or have a professional mechanic do it, it will save costs. If you ignore the warning signs your machine gives you then you will probably begin to hear the sound of your engine knock which eventually expire and cease completely.